Cone crusher locking system



Feb. 3, 1970 E. v. TRIFONOV ETAL 3,493,185

CONE CRUSHER LOCKING SYSTEM Filed Oct. 15, 19a? United States Patent U.S. Cl. 241-286 1 Claim ABSTRACT OF THE DISCLOSURE A cone crusher has an adjustment ring threaded into a supporting ring, the adjustment ring being lockable by a plurality of units each having a power cylinder coupled to a rack bar for displacing the same to rotate a pinion in mesh therewith, the pinion being mounted on a thread of a fixed guide and secured to a rod whose lower end is connected to the adjustment ring.

The invention relates to cone crushers in which the size of the discharge slot is varied with the air of an adjustment ring threaded into a supporting ring and carrying a crushing bowl, the locking of said adjustment ring being efiected by means of rods rigidly connected thereto and tightened on the crushers casing.

Known in the art are crushers in which the tightening of the rods is effected manually with the aid of nuts (cf. a crusher described in the British Patent No. 826,606, Cl. 59, A13 B02d).

Also known are crushers in which the adjustment ring is locked with the aid of elastic appliances and sets of springs arranged along the perimeter of the crusher casing and via two-arm levers locking said ring. Unlocking of the adjustment ring is effected by jacks provided under each of the sets of springs (cf. the crusher according to the US. Patents Nos. 2,687,257, Cl. 241215 and 3,009,- 660, Cl. 241-290 and the British Patent No. 835,472, Cl. 59 A13 B02d).

A disadvantage of the first mentioned crushers is that the tightening and release of the rod is effected manually and requires that the crusher be stopped for the time spent in adjusting the discharge slot.

A disadvantage of the second mentioned crushers is that, to compress the springs, powerful hydraulic jacks must be provided therein, since the compressing force of the springs in the crushers of medium and fine crushing capability is from 400 to 600 tons. This complicates the crusher design and increases its weight. Due to this, such crushers have not been Widely used.

It is an object of the present invention to eliminate the disadvantages of the known crushers. The invertion makes it possible to efiect remote control over the locking of the adjustment ring with the aid of automatic means.

This object has been accomplished by providing a crusher of the invention, in which the adjustment ring is locked by means of rods connected thereto, the upper end of each said rods being located inside a cylinder-shaped 3,493,185 Patented Feb. 3, 1970 ICC guide resting upon the crusher casing, a pinion being set on said guide on a V-shaped buttress thread thereof, said pinion being connected to the upper portion of the rod and meshing with a rack bar which is coupled to the stem of a power cylinder.

Presented hereinbelow is a detailed description of an exemplary embodiment of the present. invention, reference being made to the appended drawing, wherein:

FIG. 1 is a vertical sectional view of a portion of the crusher, namely, a locking unit; and

FIG. 2 is a plan view of FIG. 1.

The locking of an adjustment ring 1 of the crusher is etfected by means of locking rods 2 provided along the perimeter of the ring and rigidly connected thereto with their lower ends. The upper ends of the rods 2 protrude above a casing 3. Arranged on the casing 3 at the places where the rods 2 extend are brackets 4 with cylindershaped guides 5 set on the rods 2. A pinion 6 whose teeth are in mesh with a rack bar 7 is mounted on each of the guides on a V-shaped buttress thread. Said rack 7 is coupled to the stern of a hydraulic cylinder 8. Each pinion is threaded on the upper end of the respective rod 2. Provision is made a top the pinion 6 for a nut 9 set on the rod 2, said nut fixing the pinion 6 in position on the rod from above. The hydraulic cylinders 81 are mounted on brackets 10 provided on the casing 3 of the crusher.

The locking of the ring 1 is effected in the following way. The stem of the hydraulic cylinder 8, While moving outwards, actuates the rack bar 7 which, in turn, causes rotation of the pinion 6 in the direction of its being screwed 011? the guide 5.

The pinion 6 travels upwards and, while resting against the nut 9, drags the associated rod 2 likewise upwards. The rods 2 draw the ring 1, thereby locking it in the thread of the supporting ring. This is how the adjustment ring 1 is locked. The unlocking of said .ring 1 takes place during a return stroke of the piston of the hydraulic cylinder 8.

What is claimed is:

-1. In a cone crusher having a casing and wherein adjustment of a discharge slot is effected by mean of an adjustment ring threaded into a supporting ring and carrying a crushing bowl an improvement comprising a looking device which consists of several units, each unit comprising: a rod connected to said adjustment ring; a cylinder-shaped guide resting on the crusher casing and accommodating the upper end of said rod; a pinion fitted over said cylinder-shaped guide on a V-shaped buttress thread thereon and coupled to the upper end of said rod; a rack bar in mesh with said pinion; and a power cylinder coupled to said rack bar.

References Cited UNITED STATES PATENTS 2,901,189 8/1959 Conway et al. 24l-2.07 3,142,449 7/1964 Balmer 241-207 X 3,405,875 10/1968 Curtis 241-207 3,420,457 1/ 1969 Peters et a1. 241207 FRANK T. YOST, Primary Examiner 

